hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestShutdownOfMetaReplicaHolder.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.client;
  19
  20 import org.apache.hadoop.hbase.HBaseClassTestRule;
  21 import org.apache.hadoop.hbase.HConstants;
  22 import org.apache.hadoop.hbase.HRegionLocation;
  23 import org.apache.hadoop.hbase.ServerName;
  24 import org.apache.hadoop.hbase.TableName;
  25 import org.apache.hadoop.hbase.testclassification.MediumTests;
  26 import org.apache.hadoop.hbase.testclassification.MiscTests;
  27 import org.junit.BeforeClass;
  28 import org.junit.ClassRule;
  29 import org.junit.Test;
  30 import org.junit.experimental.categories.Category;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 @Category({ MiscTests.class, MediumTests.class })
  35 public class TestShutdownOfMetaReplicaHolder extends MetaWithReplicasTestBase {
  36
  37   @ClassRule
  38   public static final HBaseClassTestRule CLASS_RULE =
  39     HBaseClassTestRule.forClass(TestShutdownOfMetaReplicaHolder.class);
  40
  41   private static final Logger LOG = LoggerFactory.getLogger(TestShutdownOfMetaReplicaHolder.class);
  42
  43   @BeforeClass
  44   public static void setUp() throws Exception {
  45     startCluster();
  46   }
  47
  48   @Test
  49   public void testShutdownOfReplicaHolder() throws Exception {
  50     // checks that the when the server holding meta replica is shut down, the meta replica
  51     // can be recovered
  52     try (Connection conn = ConnectionFactory.createConnection(TEST_UTIL.getConfiguration());
  53       RegionLocator locator = conn.getRegionLocator(TableName.META_TABLE_NAME)) {
  54       HRegionLocation hrl = locator.getRegionLocations(HConstants.EMPTY_START_ROW, true).get(1);
  55       ServerName oldServer = hrl.getServerName();
  56       TEST_UTIL.getHBaseClusterInterface().killRegionServer(oldServer);
  57       LOG.debug("Waiting for the replica {} to come up", hrl.getRegion());
  58       TEST_UTIL.waitFor(30000, () -> {
  59         HRegionLocation loc = locator.getRegionLocations(HConstants.EMPTY_START_ROW, true).get(1);
  60         return loc != null && !loc.getServerName().equals(oldServer);
  61       });
  62       LOG.debug("Replica {} is online on {}, old server is {}", hrl.getRegion(),
  63         locator.getRegionLocations(HConstants.EMPTY_START_ROW, true).get(1).getServerName(),
  64         oldServer);
  65     }
  66   }
  67 }